Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd0e47f453c7f43…

MALICIOUS

PDF

41.2 KB Created: 2020-08-06 15:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f9f9b57515e6c6167c0769402c0c53 SHA-1: e6512a05064e10083015095015402a48075d25d9 SHA-256: dfd0e47f453c7f43cfe394e39ac162b6441b2c1e7bb4f71c3e92b1c9ee4480e3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, characteristic of a link farm designed to obscure malicious destinations. The primary redirector URL, https://ttraff.com/pify?keyword=difference+between+phonetics+and+phonology+examples+pdf, is flagged as malicious. The document body, though partially corrupted, contains text related to the URL's keyword, suggesting a lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=difference+between+phonetics+and+phonology+examples+pdf
    • http://files.usfproject-benitez.com/uploads/1/3/1/4/131483955/366b73.pdf
    • http://files.youthovergunsny.org/uploads/1/3/0/7/130739571/xamonagozugob.pdf
    • http://wigonato.wellbee-ing.com/uploads/1/3/1/4/131408024/4962497.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/pururekinuvotopozi.pdf
    • https://cdn.shopify.com/s/files/1/0439/6272/8606/files/80033513964.pdf
    • https://cdn.shopify.com/s/files/1/0437/7634/4225/files/73183219259.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/82104403392.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/4804932860.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/59546199181.pdf
    • https://cdn.shopify.com/s/files/1/0440/6181/9045/files/45155593366.pdf
    • https://cdn.shopify.com/s/files/1/0436/9547/2794/files/product_business_plan_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/vajibev.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d94.bin
db7a222607d182bd2bd82ca52d3eac739232688c5a30e5e7688a1eeab87cf8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 5968 bytes
font_01_sfnt_off000071e5.bin
595a09b8b7a3582f1185f3fe22f1f356a9fc1c9bcece2bad0a4ec3fa4c9b5698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E5 10500 bytes

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